Can I manage multiple domains with G Suite?

If your organization acquires a new domain name or does business at multiple
domains, you can add all your domains to your account at no extra cost. Users
can then have identities at one or more of your domains while sharing
services as part of a single organization. And you can manage your domains
from the same Admin console. Add a
domain as either a separate domain or domain alias, depending on how you plan
to use it.

Can I grant administrative privileges to other users?

Yes. No matter the size of your organization, we recommend that you
distribute the responsibility of managing your users and services among a
select set of trusted users. You can grant a user administrative privileges
by assigning them one of the available administrator roles. Assigning a role
grants the user access to your Admin console. You can make a user a super
administrator who can perform all tasks in the Admin console. You can also assign an
administrator a role that limits which tasks the administrator can perform.
For example, allowing them only to create groups, manage service settings, or
reset a user's password.

Can I control users’ access to certain features or services?

Initially, most services are turned on for all of your users. You can use the
Admin console to turn off services
you don't want people to use, or to customize how services work. You have the
option to enable the same settings for everyone or apply unique policies to
different users. For example, you might turn on Hangouts just for your support team or allow
only the marketing department to share public Google Sites.